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DITECH CORPORTION
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CLEVELAND, OH, US
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Patents Grants
last 30 patents
Information
Patent Grant
Fiber amplifier with fast transient response and constant gain
Patent number
6,407,854
Issue date
Jun 18, 2002
Ditech Corporation
Frank Shum
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-port optical multiplexer element
Patent number
6,381,049
Issue date
Apr 30, 2002
Ditech Corporation
David J. Xu
G02 - OPTICS
Information
Patent Grant
Broadband optical transmission system utilizing differential wavele...
Patent number
6,229,632
Issue date
May 8, 2001
Ditech Corporation
Salim Jabr
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for optical amplifier gain and noise figure me...
Patent number
6,016,213
Issue date
Jan 18, 2000
Ditech Corporation
Gennady Farber
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for monitoring wavelength multiplexed optical...
Patent number
5,969,834
Issue date
Oct 19, 1999
Ditech Corporation
Gennady I. Farber
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Bidirectional optical amplifier having flat gain
Patent number
5,887,091
Issue date
Mar 23, 1999
Ditech Corporation
Salim N. Jabr
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier having dynamically shaped gain
Patent number
5,861,981
Issue date
Jan 19, 1999
Ditech Corporation
Salim N. Jabr
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Trademark
last 30 trademarks
Information
Trademark
75536920 - VQOS
Serial number
75536920
Filing date
Aug 14, 1998
Ditech Corporation
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
75536919 - VOICE QUALITY OF SERVICE - VQOS
Serial number
75536919
Filing date
Aug 14, 1998
Ditech Corporation
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
75440516 - DITECH
Serial number
75440516
Registration number
2559138
Filing date
Feb 25, 1998
Ditech Corporation
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
75440523
Serial number
75440523
Registration number
2540773
Filing date
Feb 25, 1998
Ditech Corporation
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
75276306 - THE CLEAR SOLUTION
Serial number
75276306
Filing date
Apr 17, 1997
Ditech Corporation
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information
Trademark
75276307 - DART
Serial number
75276307
Filing date
Apr 17, 1997
Ditech Corporation
9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments